ref: c298755da55d89d842551da6272e42613ce0f61f
dir: /test/utils/BufferedData.h/
#ifndef __BUFFEREDDATA_H__ #define __BUFFEREDDATA_H__ #include <stddef.h> #include <stdlib.h> #include "../test_stdint.h" #include <algorithm> class BufferedData { public: BufferedData() : data_ (NULL), capacity_ (0), length_ (0) {} ~BufferedData() { free (data_); } bool PushBack (uint8_t c) { if (!EnsureCapacity (length_ + 1)) { return false; } data_[length_++] = c; return true; } bool PushBack (const uint8_t* data, size_t len) { if (!EnsureCapacity (length_ + len)) { return false; } memcpy (data_ + length_, data, len); length_ += len; return true; } size_t PopFront (uint8_t* ptr, size_t len) { len = std::min (length_, len); memcpy (ptr, data_, len); memmove (data_, data_ + len, length_ - len); SetLength (length_ - len); return len; } void Clear() { length_ = 0; } void SetLength (size_t newLen) { if (EnsureCapacity (newLen)) { length_ = newLen; } } size_t Length() const { return length_; } uint8_t* data() { return data_; } private: bool EnsureCapacity (size_t capacity) { if (capacity > capacity_) { size_t newsize = capacity * 2; uint8_t* data = static_cast<uint8_t*> (realloc (data_, newsize)); if (!data) return false; data_ = data; capacity_ = newsize; return true; } return true; } uint8_t* data_; size_t capacity_; size_t length_; }; #endif //__BUFFEREDDATA_H__